/Engine/Plugins/Experimental/ScreenReader/Source/ScreenReader/Public/Navigation/ScreenReaderNavigationPolicy.h
Returns the first instance of a previous sibling from the source widget that satisfies the navigation policy.
virtual [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IAccessibleWidget](API\Runtime\ApplicationCore\GenericPlatform\Accessibility\IAccessibleWidget) > GetPreviousSiblingFrom ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [IAccessibleWidget](API\Runtime\ApplicationCore\GenericPlatform\Accessibility\IAccessibleWidget) > & Source ) const